urine

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Scope note
Clear amber liquid (mammals, aquatic species) or grayish semisolid (birds, reptiles) excretion of metabolic waste from vertebrates. In mammals, urine is formed in the kidneys. It is a collection of water-soluble by-products of protein metabolism (urea, creatinine, uric acid, ammonia, etc.) mixed with salts and pigments. Urine has been used in cleaning, dyeing, and tanning.
urine
Accepted term: 22-Apr-2024